A bit part is a small ROLE in a movie, play, or other production. A CAMEO is a brief appearance of a famous person in a movie or show. An ATOM is a very small part of something. An EXTRA is an actor who appears in the background of a scene. A ROLE is a character in a movie, play, or other production. A SPOT is a short part in a movie, play, or other production. A MAID is a female servant. A walk-on is an actor who has no lines and appears briefly in a scene. A one-liner is a joke or phrase that is only one line long. A walk-on part is a small ROLE in a movie, play, or other production that requires no lines.